1

FEATURES

DESCRIPTION

APPLICATIONS

IN

VSS

BAT

bq24075

bq24079

OUT

EN

2

TS

TEMP

PACK+

PACK-

SYSTEM

SYSOFF

System

ON/OFF

Control

IN

13

8

15

1

2

3

5

10

11

1 F

m

4.7 F

m

4.7 F

m

1.13kW

1.18kW

1kW

1kW

bq24072, bq24073

bq24074, bq24075, bq24079

1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

• Fully Compliant USB Charger

–

Selectable 100mA and 500mA Maximum

The bq2407x series of devices are integrated Li-ion

linear chargers and system power path management

Input Current

devices

targeted

at

space-limited

portable

–

100mA Maximum Current Limit Ensures

applications. The devices operate from either a USB

Compliance to USB-IF Standard

port or AC adapter and support charge currents up to

–

Input based Dynamic Power Management

1.5A. The input voltage range with input overvoltage

protection supports unregulated adapters. The USB

Sources

input current limit accuracy and start up sequence

allow the bq2407x to meet USB-IF inrush current

• 28V Input Rating with Overvoltage Protection

specification. Additionally, the input dynamic power

• Integrated Dynamic Power Path Management

(DPPM) Function Simultaneously and

crashing incorrectly configured USB sources.

Independently Powers the System and

The

bq2407x

features

dynamic

power

path

Charges the Battery

management (DPPM) that powers the system while

• Supports up to 1.5A Charge Current with

simultaneously

and

independently

charging

the

Current Monitoring Output (ISET)

battery. The DPPM circuit reduces the charge current

when the input current limit causes the system output

• Programmable Input Current Limit up to 1.5A

to fall to the DPPM threshold; thus, supplying the

for Wall Adapters

system load at all times while monitoring the charge

• System Output Tracks Battery Voltage

current separately. This feature reduces the number

(bq24072)

of charge and discharge cycles on the battery, allows

• Programmable Termination Current (bq24074)

for proper charge termination and enables the system

to run with a defective or absent battery pack.

• Battery Disconnect Function with SYSOFF

Input (bq24075, bq24079)

Typical Application Circuit

• Programmable Pre-Charge and Fast-Charge

Safety Timers

• Reverse Current, Short-Circuit and Thermal

Protection

• NTC Thermistor Input

• Proprietary Start Up Sequence Limits Inrush

Current

• Status Indication – Charging/Done, Power

Good

• Small 3 mm × 3 mm 16 Lead QFN Package

• Smart Phones

• Portable Media Players

• Portable Navigation Devices

• Low-Power Handheld Devices

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.